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Installing the Projector
DLA-G150CLE / LCT1124-001A / ENGLISH
Projection Distance and Screen Size
• The range of projection distances that can be focused depends on the lens unit (optional) to be used. When the aspect ratio
of the screen is 4:3, the range is as follows and you need to install the projector within this range.
Lens type
Approximate projection distance
GL-M2910G 0.77 m to 4.03 m
GL-M2915SG 1.76 m to 4.50 m
GL-M2920ZG 2.77 m to 19.71 m
GL-M2930SZG 4.74 m to 29.87 m
*: The value for projection distance is a guide (reference) one. The projected image size may vary depending on the
manufacturing tolerance of the projection lens.
Notes
• For detailed relationship between projection distances and projection screen sizes, refer to Appendix A. The relationships for
both 4:3 and 16:9 ratios are listed there.
• When installing a screen, use a 4:3 aspect-ratio picture.
• (A 16 : 9 aspect-ratio picture is projected based on the width of the range in which a 4:3 aspect-ratio picture is projected.)
• The diagonal length of a 16:9 aspect-ratio screen is about 91.8% that of a 4:3 aspect-ratio screen. This value is only a guide
(reference).
• If sunlight or lamp light strikes the projection screen directly, the picture tends to become pale and dim. Use a curtain or
other means to shield the light.
• Set the projector horizontally on a surface that is within the range of adjustable angles (up/down adjustment angle: +7° ;
horizontal adjustment angle: ±1.5°).
• If the keystone is adjusted, the projected screen becomes smaller.
• When hanging from the ceiling, use a dedicated hanging fixture (not supplied).
■ Optional Lenses
This projector does not include a lens. You can select one of the optional lenses to adjust the projection distance. Please ask
your authorized dealer or service center to install the lens.
Lens model Function
GL-M2910G Powered focus for rear projection, short focal length (subject ratio 1:1), 0% influence.
GL-M2915SG
Powered focus, short focal length (subject ratio 1.5:1), powered image adjustment (2%
zoom), includes manual vertical shift function, 30%-55% influence
GL-M2920ZG Powered zoom/powered focus lens (subject ratio 2:1-3:1), 50% influence.
GL-M2930SZG
Powered zoom/powered focus long focal length lens (subject ratio 2.9:1-5.5:1), includes
manual vertical shift function, 30%-55% influence.
90˚ 90˚ 90˚
Screen
Change of projection screen
according to aspect ratio
Screen with 4:3 aspect ratio
Screen with 16:9 aspect ratio
Center line of the lens
To move the Shift position by 50%, set the bottom edge of the projec-
tion screen so that it is at the same height as the center of the lens.
DLA-G150CLU&CLE_Eng.book Page 18 Thursday, February 21, 2002 5:45 PM